Uplink Channel Transmission Beam Switching for Multi-TRP
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Solution Overview
Problem
In 5G NR systems, terminal devices face challenges in efficiently switching beams for uplink channel transmissions to multiple Transmit-Receive Points (TRPs) of a base station, leading to suboptimal performance in beam direction switching and resource utilization.
Innovation Solution
The method involves performing two adjacent repetitive transmissions using different transmitting beams on separate time-domain resources, with a designated beam switching time to switch beam directions between these resources, allowing the terminal device to effectively transmit to different TRPs within the same base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device performs repetitive transmissions to multiple TRPs using different beams, then the reliability of uplink channel transmission is improved, but the beam switching time increases the loss of time
Solution Approach 1:
The patent applies preliminary action by pre-configuring beam switching time between adjacent transmission resources. The network device indicates beam switching time to the terminal device through Downlink Control Information (DCI) or RRC signaling in advance, allowing the terminal to prepare for beam switching before actual transmission occurs. This pre-planning reduces the impact of beam switching on transmission timing while ensuring reliable multi-TRP communication.
2Adaptability or versatility
If the terminal device switches beam direction for different TRPs, then the adaptability of the transmission system is improved, but the complexity of beam management increases
Solution Approach 1:
The patent implements feedback mechanisms where the network device monitors the terminal device's beam switching performance and transmission quality. Based on this feedback, the network can adjust beam switching time parameters, reconfigure transmission resources, or optimize beam directions through RRC signaling. This closed-loop feedback system enables adaptive beam management that balances multi-TRP adaptability with operational complexity.
Data Source
AI summary
An uplink channel transmission method, performed by a terminal device, including: performing two adjacent repetitive transmissions of same data in an uplink channel on a first transmission resource and a second transmission resource respectively; where the two adjacent repetitive transmissions use different transmitting beams to transmit to different Transmit-Receive Points (TRP) of a same base station, a beam switching time for switching a beam direction is presented between time-domain resources of the first transmission resource and the second transmission resource; the first transmission resource corresponds to a former transmission occasion in two adjacent transmission occasions for uplink channel transmitting; the second transmission resource corresponds to a latter transmission occasion in the two adjacent transmission occasions for uplink channel transmitting.